ISO 14040

The ISO 14040 standard sets out the principles and framework for Life Cycle Assessment (LCA), a key tool for measuring and evaluating the environmental impacts associated with products, services or processes across their entire life cycle. It is part of the international environmental management standards developed by ISO.

What is ISO 14040?

ISO 14040 is an international standard developed by the International Organization for Standardization (ISO) that provides the methodological framework for carrying out a Life Cycle Assessment. It was first published in 1997 and revised in 2006 (ISO 14040:2006), and forms part of the ISO 14000 family of environmental management standards.

Its main purpose is to standardise environmental impact assessment so that results are consistent, transparent and comparable. This is particularly useful when companies want to identify and reduce their environmental footprint.

Principles of ISO 14040

ISO 14040 is built on a set of principles that guide how an LCA should be carried out:

• Life cycle perspective: it analyses all stages of a product or service, from raw material extraction to final disposal.
• Comprehensiveness: it considers all relevant environmental impacts, including greenhouse gas emissions, resource consumption and waste generation.
• Transparency: it requires clear documentation of the methods, data and assumptions used.
• Relevance: results must be aligned with the decision they are meant to support.

The four phases of an LCA

ISO 14040 defines four phases for conducting an LCA:

1. Goal and scope definition

The objectives, system boundaries and scope of the study are set, specifying which processes and environmental indicators will be assessed.

2. Life cycle inventory analysis (LCI)

This phase collects data on the input and output flows of the system, such as energy use, emissions and materials. It is central to carbon footprint measurement, as it identifies emission sources at each stage. See Life Cycle Inventory (LCI) for more detail.

3. Life cycle impact assessment (LCIA)

The inventory data is translated into specific environmental impacts, such as global warming potential, acidification or eutrophication. See Life Cycle Impact Assessment (LCIA).

4. Interpretation

The findings are analysed to identify areas for improvement and to develop recommendations. Transparency and clarity in this phase are what make the results credible and actionable.

ISO 14040 and carbon footprint measurement

ISO 14040 is highly relevant for carbon footprint work, because it provides a structured way to identify and quantify greenhouse gas emissions across the whole life cycle, including direct and indirect emissions that map to Scope 1, Scope 2 and Scope 3 under the GHG Protocol. For product carbon footprints specifically, it underpins more detailed standards such as ISO 14067.

Applications of ISO 14040

• Sustainable product design: identifying materials and processes with lower environmental impact.
• Supply chain management: assessing and reducing supplier and logistics impacts.
• Environmental communication: providing verifiable data for eco-labels, Environmental Product Declarations and sustainability reports.
• Decarbonisation strategies: identifying priority areas for emission reductions.

Relationship with other standards

• ISO 14044: provides the detailed requirements and guidelines for conducting LCA studies, complementing the principles in ISO 14040.
• GHG Protocol: complements ISO 14040 with a framework for measuring and managing GHG emissions.
• ISO 50001: focused on energy management, it can be combined with LCA to improve resource efficiency.

Benefits of applying ISO 14040

• Better sustainability: it highlights opportunities to reduce impacts and use resources more efficiently.
• Competitive advantage: it demonstrates a credible commitment to sustainability.
• Regulatory readiness: it supports compliance with environmental rules and certification requirements.
• Cost savings: it reveals process inefficiencies that can be addressed.

ISO 14040 is an essential reference for any organisation that wants to evaluate and manage its environmental impact systematically. At Manglai we help companies apply a life cycle approach, measure their carbon footprint and turn the results into a decarbonisation strategy. Discover how Manglai can help you.